当我尝试编译C它使用OpenSSL的代码“密码”的库函数与COMAND线-lcrypto与gcc 4.4.3它给出了一个错误
C
-lcrypto
gcc 4.4.3
`@ubu:$ gcc -ggdb aes_m.c -Werror -Wall -I /usr/local/ssl/include/ -lcrypto -o aes /usr/bin/ld: cannot find -lcrypto collect2: ld returned 1 exit status`
这可能是什么原因?
找到命令结果
$ locate libcrypto /home/abhi/Downloads/openssl-1.0.1b/libcrypto.a /home/abhi/Downloads/openssl-1.0.1b/libcrypto.pc /lib/libcrypto.so.0.9.8 /lib/i486/libcrypto.so.0.9.8 /lib/i586/libcrypto.so.0.9.8 /lib/i686/cmov/libcrypto.so.0.9.8 /usr/lib/libcrypto.so.0.9.8 /usr/lib/vmware-tools/lib32/libcrypto.so.0.9.8 /usr/lib/vmware-tools/lib32/libcrypto.so.0.9.8/libcrypto.so.0.9.8 /usr/lib/vmware-tools/lib64/libcrypto.so.0.9.8 /usr/lib/vmware-tools/lib64/libcrypto.so.0.9.8/libcrypto.so.0.9.8 /usr/local/ssl/lib/libcrypto.a /usr/local/ssl/lib/pkgconfig/libcrypto.pc
有人可以帮忙吗,或者指出我正在做的任何错误
@ Daniel Roethlisberger尝试使用-L标志,但是导致这些错误
gcc -ggdb aes_m.c -Werror -Wall -I /usr/local/ssl/include/ -L /usr/local/ssl/lib -lcrypto -o aes /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_globallookup': dso_dlfcn.c:(.text+0x2d): undefined reference to `dlopen' dso_dlfcn.c:(.text+0x43): undefined reference to `dlsym' dso_dlfcn.c:(.text+0x4d): undefined reference to `dlclose' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_pathbyaddr': dso_dlfcn.c:(.text+0x8f): undefined reference to `dladdr' dso_dlfcn.c:(.text+0xe9): undefined reference to `dlerror' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_bind_func': dso_dlfcn.c:(.text+0x4b1): undefined reference to `dlsym' dso_dlfcn.c:(.text+0x590): undefined reference to `dlerror' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_bind_var': dso_dlfcn.c:(.text+0x611): undefined reference to `dlsym' dso_dlfcn.c:(.text+0x6f0): undefined reference to `dlerror' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_unload': dso_dlfcn.c:(.text+0x755): undefined reference to `dlclose' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In function `dlfcn_load': dso_dlfcn.c:(.text+0x837): undefined reference to `dlopen' dso_dlfcn.c:(.text+0x8ae): undefined reference to `dlclose' dso_dlfcn.c:(.text+0x8f5): undefined reference to `dlerror' collect2: ld returned 1 exit status
非常感谢
-L /usr/local/ssl/lib/在之前,将其添加到GCC命令行中-lcrypto。由于您是根据下的OpenSSL标头构建的,因此/usr/local/ssl,您还需要链接到具有相同前缀的实际库(即使您似乎只在其中安装了静态库,这可能也可能不是您的意图;您可能需要正确地重新安装从源代码构建的OpenSSL)。
-L /usr/local/ssl/lib/
/usr/local/ssl
(编辑)要修复dlopen()链接器找不到的和朋友,请添加-ldl到GCC命令行中。-ldl告诉连接器还针对libdl.so链路,其是包含共享库dlopen(),dlsym(),dlclose()等; 这些功能由OpenSSL在内部使用,因此-ldl在使用-lcrypto(在Linux上)时是间接依赖项。因为要链接到libcrypto的静态版本,所以需要显式链接所有间接依赖项。
dlopen()
-ldl
dlsym()
dlclose()
如果您不熟悉链接到正确的库的方法,建议您使用从操作系统软件包管理器安装的OpenSSL。可能会为您节省一些麻烦。